msem-instigator

Choose one or both —
• Target player searches their library for a basic Plains card, reveals it, put it into their hand, then shuffles.
• Exile target permanent you control, then return it to the battlefield under its owner's control.

Create three 1/1 colorless Spirit creature tokens.

Choose three. You may choose the same mode more than once.
• Tap target nonland permanent. It doesn't untap during its controller's next untap step.
• Exile target creature you control, then return it to the battlefield under your control.
• Target creature gets +1/+0 and gains lifelink and first strike until end of turn.

Choose one or both —
• You gain 5 life.
• Each player draws three cards.

This spell costs {2} more to cast for each target beyond the first.
Choose one or more —
• Exile target enchantment.
• Target player creates two tapped 1/1 white Soldier creature tokens.
• Taranika's Endeavor deals damage equal to the number of creatures you control to target creature or planeswalker.

Return two target creature cards from your graveyard to the battlefield. Shuffle Tearful Reunion into its owner's library.

Arm target creature you control. That creature gets 0/+2 and gains flying until end of turn. (To arm a creature, create a colorless Equipment artifact token with “Equipped creature gets +1/+0” and equip {2}, then attach it to that creature.)

When Temporal Rift enters, exile target creature an opponent controls until Temporal Rift leaves the battlefield.
Whenever you aetherize, you may return Temporal Rift to its owner's hand.

Choose one —
• Exile target creature. Return that card to the battlefield under its owner's control at the beginning of the next end step.
• Until end of turn, if a creature would enter and it wasn't cast, exile it instead.
Flashback {1}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Create a 1/1 white Bird creature token with flying, then invigorate 1. (Choose a creature with the least power among creatures you control and put a +1/+1 counter on it.)

Enchant nonland permanent
Enchanted permanent's activated abilities can't be activated and triggered abilities of enchanted permanent don't trigger.

Enchant creature
Enchanted creature has base power and toughness 1/1, and its activated abilities can't be activated.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
Destroy target creature you don't control with the greatest power.
Until your next turn, prevent all damage that would be dealt to you and planeswalkers you control.
Exile target card from a graveyard. You gain 2 life.

At the beginning of your upkeep, destroy target creature with the greatest power or tied for greatest power among creatures on the battlefield. Then if there are no creatures on the battlefield, sacrifice The Empty Throne.

Destroy target tapped creature.
Reconstruct {4}{W} (You may cast this from your graveyard for its reconstruct cost reduced by the mana value of a permanent you sacrifice as you cast it this way. Then exile this.)

Golden age (If you cast an instant or sorcery spell, activated a nonmana ability, and attacked this turn, enter a renaissance for this game.)
If you're in a renaissance, you may have up to one target creature or planeswalker gain indestructible until end of turn.
Destroy all creatures and planeswalkers.

Creatures you control get +1/+1 until end of turn.
Showcase {2}{W}{W} (Then if you cast this for its showcase cost, create a 1/1 red Bard creature token that can't block and exile this. Whenever it attacks, you may cast a free copy of this.)

Flash
{1}{W}: Exile target creature that dealt damage to you this turn until The Shield leaves the battlefield.

At the beginning of each end step, if you gained life this turn, put a +1/+1 counter on up to one target creature.

Create a 1/1 white Spirit creature token with flying. (Then exile this card. You may cast the artifact later from exile.)

Creatures you control get +2/+0 until end of turn.
Metamorph {1}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

(As this Discovery enters and after your draw step, add a progress counter. Stop after you've discovered.)
I, II — Look at the top five cards of your library. Put up to one creature card with mana value 2 or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order.
Discovery — At the beginning of combat on your turn, tap target creature an opponent controls.

Each creature you control enters with an additional +1/+1 counter on it.
Each planeswalker you control enters with an additional loyalty counter on it.

Exile any number of target creatures and/or planeswalkers you control. You gain 1 life for each card exiled this way, then return them to the battlefield under your control.

Target creature gets +1/+1 for each creature you control and gains flying and vigilance until end of turn.